1) 17 - 2x = 5 - 6x
-2x + 6x = 5 - 17
4x = -12
x = -12 / 4
x = -3.
2) 2(4x - 5) = 2x + 8
8x - 10 = 2x + 8
8x - 2x = 10 + 8
6x = 18
x = 18 / 6
x = 3.
3) 3x - 10 = 5x + 2(4x - 5)
3x - 10 = 5x + 8x - 10
3x - 5x - 8x = - 10 + 10
10x = 0.
x = 0.
4) 6x - 6(2x + 5) = 4(5x - 1)
6x -12x - 30 = 20x - 4
6x - 12x - 20x = -4 + 30
-26x = -26
x = -26 / -26
x = 1.
5) 11 - 4(3x - 1) - 5(4x - 3) = 3x
11 - 12x + 4 - 20x + 15 = 3x
-12x - 20x - 3x = -15 - 4 - 11
-35x = -30
x= -30 / -35
x = 30/35 (дробь)
6) 8(x - 3) + 1 = 5(2x + 3) - 2x
8x - 24 + 1 = 10x + 15 - 2x
8x - 10x + 2x = 15 + 24 - 1
0x = 38
Нет корней.
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Answers & Comments
1) 17 - 2x = 5 - 6x
-2x + 6x = 5 - 17
4x = -12
x = -12 / 4
x = -3.
2) 2(4x - 5) = 2x + 8
8x - 10 = 2x + 8
8x - 2x = 10 + 8
6x = 18
x = 18 / 6
x = 3.
3) 3x - 10 = 5x + 2(4x - 5)
3x - 10 = 5x + 8x - 10
3x - 5x - 8x = - 10 + 10
10x = 0.
x = 0.
4) 6x - 6(2x + 5) = 4(5x - 1)
6x -12x - 30 = 20x - 4
6x - 12x - 20x = -4 + 30
-26x = -26
x = -26 / -26
x = 1.
5) 11 - 4(3x - 1) - 5(4x - 3) = 3x
11 - 12x + 4 - 20x + 15 = 3x
-12x - 20x - 3x = -15 - 4 - 11
-35x = -30
x= -30 / -35
x = 30/35 (дробь)
6) 8(x - 3) + 1 = 5(2x + 3) - 2x
8x - 24 + 1 = 10x + 15 - 2x
8x - 10x + 2x = 15 + 24 - 1
0x = 38
Нет корней.